DS5028E Datasheet, PDF (19/41 Pages) Richtek Technology Corporation – Integrated PMIC with 4-Channel Synchronous Buck Converters, 8 LDOs, and MTP Non-Volatile Memory for Industrial Applications

RT5028E
PMU On/Off Sequence Setting
In the RT5028E, users can set the power on/off sequence and output voltage by I²C register 0x01 to 0x04 for Buck
output voltage, 0x07 to 0x0E for LDO output voltage and 0x2C to 0X32 for startup sequence setting.
In the table below, users must set one by one (continues number) and missing code is not allowed.
If users miss sequence code, the RT5028E will wait for next channel and the IC will be hold in waiting status.
Buck1
Buck2
Buck3
Buck4
LDO1
LDO2
LDO3
LDO4
LDO5
LDO6
LDO7
LDO8
Output Voltage Setting
Buck1Output[5:0]
[000000]
Buck2Output[5:0]
[101100]
Buck3Output[5:0]
[000000]
Buck4Output[5:0]
[101100]
LDO1OUT[6:0]
[0000000]
LDO2OUT[6:0]
[0101000]
LDO3OUT[6:0]
[0000000]
LDO4OUT[6:0]
[0101000]
LDO5OUT[6:0]
[0000000]
LDO6OUT[6:0]
[0101000]
LDO7OUT[6:0]
[0000000]
LDO8OUT[6:0]
[0101000]
Startup Sequence Setting
Buck1_Seq[3:0]
[0001]
Buck2_Seq[3:0]
[0010]
Buck3_Seq[3:0]
[0011]
Buck4_Seq[3:0]
[0100]
LDO1_Seq[3:0]
[0101]
LDO2_Seq[3:0]
[0110]
LDO3_Seq[3:0]
[0111]
LDO4_Seq[3:0]
[1000]
LDO5_Seq[3:0]
[1001]
LDO6_Seq[3:0]
[1010]
LDO7_Seq[3:0]
[1011]
LDO8_Seq[3:0]
[1100]
Startup Enable Method
(Soft-Start Control)
[10]
Note :
* Output Voltage Setting: fill relative binary code to set the output voltage.
* Startup Sequence Setting :
“0000” denotes no operation (disable).
“0001” denotes first-startup.
“1100 to 1111” denotes last-startup.
If same number, it means startup at the same time.
*Startup Enable Method :
[01] to [11] : each startup enable interval time (1ms, 4ms, 8ms).
[00] : start end voltage (the output voltage's 80%)
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS5028E-00 October 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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